Air-valve.



P. H. SAUER.

AIR VALVE.

APPLICATION FILED 11017.18, 191s.

1,101,570. Patented June 30,1914.

AP" co..wAsmNu'm'N. D. c.

UNTTED STATES PATEN T @FFTGE.

FREDERICK H. SAUEB, OF NEW YORK, N. Y.

AIR-VALVE.

Application filed November 18, 1913.

To all whom it may concern:

Be it known that I, Fnnonnlok a citizen of the United States, New York city, in the county of New York H. SAUER,

and State of New York, have invented a new Air-Valves, of

and useful Improvement in which the following is a speclfication.

Thls invention relates to rangement of the expansible member employed in these devices, and to the character;

of the supports therefor.

My improvements also include certain structural features of novel character whose interrelation and arrangement aid in rendering the apparatus more efficient and ser-' Fig. 1.

In said drawing the valve casing is seen to be composed of a lower portion 1, having an offset threaded tubular portion 2, for connection with a radiator, and an upper portion 3, said portions 1 and 3 having respectively internal and external screw threads, by which they may be connected together. The casing portion 3 is contracted at its upper end in the formation of a primary cap 4, having a central orifice for the reception of the usual adjusting screw 5, the material of said cap 1 extending upwardly, in tubular form, as a neck 6, surrounding said screw 5. A recess is formed in the inner surface of neck 6, providing a space between adjusting screw 5 and said neck to contain packing; and said screw 5 has a shoulder 7, with head 8 adapted to receive a key, said shoulder 7 fitting within the recess in neck 6. The neck 6 is threaded externally, and thus receives a protective cap or housing 9, which may be screwed down upon the surface of cap 1. Screw 5 carries at its lower end, within the casing, a metallic hood 10, having a shoulder 11, adapted to seat against cap 1 when screw 5 is elevated, to prevent, withdrawal.

The casing portion 1 is contracted at its lower end 12 and here provided with an internal thread to receive an externally threaded plug or thimble 13, which may be tapered, the latter having a conoidal cavity in opposed relation to the cavity of hood 10.

Between these cavities 1s placed a hollow Specification of Letters Patent.

reslding at 'ries an upstanding tube 15 which air valves for radiators, and my improvements have par-l ticular reference to the constructlon and an Patented June 3th, 131%.

Serial No. 801,690.

cylindrical member or expansion post 1 1, of material capable of expansion and contraction in a marked degree. Thimble 13 carloosely fits within member 14;, serving as a guide for said member, the lower end of said tube penetrating the base of said thimble. Tube 15 has a port 16 near its lower end, for escape of air or fluid. A tubular head piece 17, carrying an air escape pipe 18, is held in close contact with the extremity of lower end 12 of casing portion 1 by means of a coupling 19. Essentially different in this application are the means supporting the expansible member 1&1. Said member is tapered at both ends, and thus may make steam tight connection with the interiors of hood 10 and thimble 13. The thimble 13 has an external slot or neck 20, adapted to receive a screw driver or the like and enable said thimble to be screwed within the lower casing portion to a. suitable extent. Previous to fitting thimble 13 in place the member 1 1 is placed over tube 15, and thus in assem' bling these parts said tube 15 serves as a guide for said member 1 1, enabling the upper end of the latter to be directed. to its position within hood 10, and preventing the liability of crushing the end of said member 14 against the edge of the hood, as might easily occur without the guiding influence of tube 15.

The fit of member 1 1 being loose about tube 15 at all times, said member is free to expand under the influence of heat to close its tapered ends against hood 10 and thimble 13, and also to contract with the fall in temperature. Under the latter condition air will pass off through tube 15, and moisture of condensation will find its outlet through the same passage. Should the member 1 1 for any reason stick when cooled within hood 10, it will then leave a passage between its lower end and the conoidal wall of thimble 13, at which times any moisture of condensation will pass away through port 16 in tube 15, as is obvious. The expansion member being loosely mounted upon the vent tube will drain itself from fluid between those members through port 16 and tube 15.

I claim:

1. An air valve for radiators comprising a casing, an adjusting screw at the upper end thereof, an upper seating member carried. thereby, a threaded plug rigidly screwed in the base of said casing from the lower end thereof, a central tube extending upwardly from said plug, an expansion member mounted loosely over said tube in said plug leaving a cylindrical space therebetween, said plug having a conoidal cavity to provide a seat for said expansion member, and said tube having a drain port in communication with said cylindrical space, and an air line pipe;

2. An air valve for radiators comprising a casing, an adjusting screw at the upper end thereof, a hood with conoidal cavity carried thereby, a tapered threaded plug rigidly screwed in the base of said casing from the lower end thereof, a central tube extending upwardly from said tapered plug, an expansion member mounted loosely over said tube in said plug leaving a cylindrical space therebetween said plug having a conoidal cavity to provide a seat for said expansion member and to provide a chamber between said plug and the lower end of said expansion member, said tube having a drain port in communication with said cylindrical space, and an air line pipe.

3. An air valve for radiators comprising a casing, an adjusting screw at the upper end thereof, a hood with conoidal cavity carried by said screw within said casing, a screw plug with a conoidal cavity rigidly mounted in the lower end of said casing, said plug having a central orifice, an air line escape pipe in communication with said orilies, a hollow expansion post with tapered ends extending between said hood and said plug with its opposite ends lodged respectively part way in said cavities leaving spaces intermediate its ends and said cavities, a vent tube extending upwardly from said plug orifice, said tube fitting loosely within said post to serve as a guide therefor and to form a cylindrical passage for air and moisture of condensation which may pass both through said tube and between the outer wall of said tube and the inner wall of said expansion member to the air line pipe, said tube having a port in communication with said cylindrical passage to drain trapped moisture therefrom.

4. An air valve for radiators comprising a casing, an adjusting screw at the upper end thereof, a hood with conoidal cavity carried by said screw within said casing, a tapered screw plug with a conoidal cavity rigidly mounted in the lower end of said.

casing, said plug having a central orifice, an air line escape pipe in communication with said orifice,

with tapered ends hood and plug with extending between said its opposite ends lodged respectively part way in said cavities, leaving spaces intermediate its ends and said cavities, a Vent tube fitting loosely within said post to serve as a guide therefor and as a passage for air and moisture of condensation which may pass both through said tube and through the cylindrical passage between the outer wall of said tube and the inner wall of said expansion member to the air line pipe, said tube having a port in communication with said cylindrical passage, to drain trapped moisture therefrom.

In testimony whereof I have hereunto set my hand and seal this 15th day of Nov.,

FREDERICK H. S-AUER. Witnesses:

DANIEL J. DOWLING EMMA I. MCCARTHY.

copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents;

Washington, D. G.

a hollow expansion post 

